USB Rechargeable Design: Our engraved pens are USB rechargeable. Cordless use can last up to 30 minutes of inactivity after a full charge. Portable and easy to engrave on all surfaces, such as jewelry, wood, plastic, glass, leather, metal and stone engraving. Especially suitable for beginners. Visual speed adjustment: 3 adjustable speeds (5000-18000 RPM) can adjust the working speed for different applications. The engraving pen is equipped with power control indicator and overload indicator, which can know the usage of the engraving pen in real time. High quality: with the motor of high quality to engrave the pen, the working power can reach 8w. Adopt intelligent overload protection chip, high resistance automatically cut off power supply, safe to use. The body of the electric engraving pen is made of aluminum with an ergonomic handle for comfort and even control, which makes engraving work more precise and easy. The engraving pen is small, light and practical. Versatile etch-engraving: the pen can be used as an electric engraving machine or a polishing tool. It allows you to customize or decorate in seconds almost any surface like metal, plastic, glass, ceramic, wood, leather, diamond, stone and many other things. Ideal engraving tool for diy creations, light projects, etc. Engraving kit: includes 1 main unit, 1 charging cable, 1.0mm 1.5mm drill bit, cutter: 22MM 25MM 32MM, 1 cutting rod, 30 grinding needles, 1 metal grinding head Note: The data is manual measurement, please allow 1-41cm error, in Due to differences between light and screen, there will be a certain color difference, the specific received in kind prevail.